An Approximation of Pattern Analysis for Distorted Reflector Antennas Using Structural-Electromagnetic Coupling Model

Based on the concept of structural-electromagnetic field coupling, an approximation method is developed to analyze the radiation pattern for distorted reflectors. In this method, the integration point deformation is obtained by a local interpolation scheme which utilizes the same shape functions as...

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Bibliographic Details
Published in:IEEE transactions on antennas and propagation 2013-09, Vol.61 (9), p.4844-4847
Main Authors: Zhang, Shuxin, Duan, Baoyan, Yang, Guigeng, Zong, Yali, Zhang, Yiqun
Format: Article
Language:English
Subjects:
Antennas
Applied classical electromagnetism
Applied sciences
Computer simulation
Distortion
Distortion analysis
Electromagnetic wave propagation, radiowave propagation
Electromagnetism
electron and ion optics
Exact sciences and technology
Far fields
Finite element analysis
Finite element method
Fundamental areas of phenomenology (including applications)
Interpolation
Mathematical analysis
Mathematical models
matrix assembly
Optimization
Physics
Radiocommunications
reflector antennas
Reflectors
Shape
shape functions
Structural members
Studies
Telecommunications
Telecommunications and information theory
Vectors
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Summary:Based on the concept of structural-electromagnetic field coupling, an approximation method is developed to analyze the radiation pattern for distorted reflectors. In this method, the integration point deformation is obtained by a local interpolation scheme which utilizes the same shape functions as that in the structural analysis for the radiation calculation. The phase error caused by the distortion is added to the far field integral which is computed on the structural element. Similar to the assembly of element stiffness matrices in Finite Element Method (FEM), the far field electrical vector is derived as a function of structural nodal displacements in a matrix form by collecting the integrals on structural elements. Simulation is performed with good results. The method can benefit the computation for a given reflector in the integrated structural-electromagnetic optimization design procedure.
ISSN:0018-926X
1558-2221
DOI:10.1109/TAP.2013.2267200